I'm a little skeptical about these characters (a pedophile? REALLY?) but I have a lot of faith in the Torchwood crew, and Miracle Day sounds like an amazing premise.
I'm holding out hope for awesomeness. :)
My main fear is actually that Americans are taking over the show. Captain Jack is the greatest man alive and I love everything about him, but soon, a full half of the Torchwood crew will be American with American accents. Not sure how I feel about that...
The whole pedophile thing is mostly because he is supposed to get the needle, but because of the whole no-one-on-Earth-can-die thing, he wont die.
I slightly agree with you on the American takeover issue, but I'm thinking because it is still RTD's baby he wont let it get out of hand. Its becoming a global thing, especially since the whole world knows about aliens now due to the 456. Its harder to cover up. (If that made sense, if not let me know)